Two flavours, 10kW (about $2,700US) and 13.5kW ($3,350US)... Then they want you to buy their controllers (10kw $1,680, 13.5kW $2,300US) and they have a separate controller "graphical interface" unit for about $670US

The HPD 10 motor is a notably lightweight, slowly running drive, coming with a very high specific performance and paramount efficiency. The drive is designed for the relatively low operational speed of directly driven 2-blade air screws of 1.3 to 1.5 m diameter, providing the highest possible efficiency along with only slight noise level.It is in fact a PPS device (polyphase permanently energised solenoid synchronal machine), which is operated by a tri-phase output stage DST as brushless direct current motor. The motor has a current consumption of 190A at rated power of 10kW and electric continuous operation at 52 V battery voltage. It achieves herewith a rated speed of 2100 min-1 and a torque of 42 Nm. The threshold values are approx. 220 to 230 A, according to the output stage cooling, or 50 Nm torque accelerated during take-off phase.

The motor can also be supplied for a lower specific rotation speed/voltage upon request.

Brushless direct current motors need an electronic controller which enables the rotary motion. The three components SDC, SDI and DST constitute a unit:the motor management system.The setpoint for the motor voltage, as well as the enabling of the motor are effected by the operating unit SDI (Smart Drive Interface). The central control SDC (Smart Drive Control) monitors all functions and transmits the preprocessed setpoint signal to the output stage DST (frequency converter). The output stage DST is directly powered by the battery. The DST converts the direct current into a three-phase alternating current which constitutes in the stator the rotary field for the motor.

The SDC constitutes the central element of the entire motor management. The SDC monitors the motor, the battery, the electric power, the enabling signals and the system monitoring. When developing the device, the highest possible safety for motor and the user was an essential aspect. All process conditions are monitored by two independent processors. As soon as an unsafe condition appears, either caused by failure, or by incorrect operating conditions, the SDC cuts off the system. The motor is safely decelerated and then switched to currentless mode. Due to the functional principle of the brushless direct current motor it is impossible that the motor just starts to rotate.

Not sure whether the motor requires that large cooling fan or not

TksLock

If you like this message feel free to donate BeerCoins (BTC) to: 1LxAXWmbjY6SeMf8r9HHhSKt6pWyPvWg6L

Lock wrote:Two flavours, 10kW (about $2,700US) and 13.5kW ($3,350US)... Then they want you to buy their controllers (10kw $1,680, 13.5kW $2,300US) and they have a separate controller "graphical interface" unit for about $670US

In aviation, weight is crucial. All manufacturers know that the first step is to lighten the aviator's wallet.

Apologies if this was posted before, but here is another self-feathering (so awesome) solution. I used to fly a Skywalk Tequila paraglider and happened on their site again today and ran into this using the Eck motor:

Hi,IÂ´m Johannes from NÃƒÂ¼rnberg and IÂ´m involved into the Elektro-Minimum project of Mr. Kellermann.

Here some tech. specs:Two BLDC motors from Hobbyking, 8Kw peak each.Two Jeti Spin 200 speed controllersBattery: LiFePo 10Ah each cell , i guess there are 12 cells serial and four of these packs parallel ( I first had to ask him what the actual configuration of the batteries)

This solution is working very well for the first version of this drive, it has a feasible rate of climb and a 10min runtime on full throttle.The next big changes will be a direct drive with a single motor and the change from LiFePo4 cells toward LiPo cells from Kokam.

@AussieJester: Your fears about these chinese motors are absolutely justified, the rotor bell is too weak and at a certain rpm it starts to fall in resonance....wich means that the magnets can get loose!!! With a reinforced rotor its working well for testing, but the final version will have a singe motor of higher quality and durability.

Fabulous Johannes! Welcome to the Endless Sphere. Interesting to note both folding and fixed props in the pics? I'm guessing the folder was an improvement?Also curious to know what a ten minute run-time translates to as typical flight times (guessing that most time spent aloft is just unpowered gliding?)CheersLock

If you like this message feel free to donate BeerCoins (BTC) to: 1LxAXWmbjY6SeMf8r9HHhSKt6pWyPvWg6L

someone with some aeronautical expertise tell me why you couldn't take something like this

and then add two of those colossus 12kw motors driving each their own propeller like those nice folding jobs our new friend has on his. house all the batteries and electronics in that center enclosure instead of the jet engine that they plan on putting in there. better yet have one of each and have them be interchangable. I wonder how much weight would be added to throw some of that nano solar film over the top of the whole thing, it could add range and allow the thing to charge in the sun when you are not using it.

though I must say that it is quite expensive and complex. the folding prop seems like it could be done diy, but the pitch changing one seems to have to many parts that would be hard to replicate with off the shelf parts.

gestalt wrote:someone with some aeronautical expertise tell me why you couldn't take something like this...

HAHA! Had to look that up. Fabulous! It's intended primarily as a glider, so only powered for ten minutes of flight time. Plans called for a jet engine... Couldn't find any details about amount of thrust involved... `Steada "exterior" props, perhaps replace the jet with electric fan?

This RC model good for 28lbs thrust...

Lock

If you like this message feel free to donate BeerCoins (BTC) to: 1LxAXWmbjY6SeMf8r9HHhSKt6pWyPvWg6L

gestalt wrote:some other interesting prop design, changes the pitch of the prop while in use...

Nice one gestalt... from that page:

This results in substantial savings in fuel, engine wear and noise.

It'd be nice to see some actual figures on fuel savings/how efficiency changes with the pitch... The sense I get for the powered paragliders and fixed wing ultralights is that they motor off the ground and some inflight but also switch off and glide much of the time? Better to utilize thermals to maintain height versus battery power? Anyway, if so, I'll guess the folding prop would generate better overall efficiency over the length of flight if unpowered gliding is part of the plan... Lock

If you like this message feel free to donate BeerCoins (BTC) to: 1LxAXWmbjY6SeMf8r9HHhSKt6pWyPvWg6L

I'm digging it, so essentially turning that body into a massive ducted fan. If it does only use the jet engine sparingly it would make sense, even keeping true to its original anime form in the movie "nausicaa and the valley of the wind". if you are into anime and haven't seen the film shame on you. In the movie it jet bursts to altitude and then glides, only using the engine for more than bursts occasionally. but if you didn't catch it, here is the video of the 1/5 scale jet powered rc version and it flies like a mofre http://www.youtube.com/watch?v=3Nkc-Rhgb7Y

I have been trying to figure out a way to make a top riding light aircraft for quite some time and since it's called opensky, I sure hope they are open source because I'm going to be "borrowing" quite a bit from their design. If that fan generates 28lbs I wonder how much force the prop units out there produce.

edit: I just found the specs on the electraflyer and it says the thrust generated is 140lbs. So you would have to upgrade the power of the fan design to five times greater output but doesn't seem out of the realm of possibility.

gestalt wrote:I just found the specs on the electraflyer and it says the thrust generated is 140lbs. So you would have to upgrade the power of the fan design to five times greater output but doesn't seem out of the realm of possibility.

It isn't quite a flux capacitor, but Jonathan Trent, a marine biologist, is working with NASA to create biofuels using the effluent pumped out ofwastewater treatment plants. Trent detailed his latest research at the fourth annual Electric Aircraft Symposium, in Santa Rosa, Calif.,organized by the CAFE Foundation. His system uses energy from the sun to operate, and cleans the water while growing algae that can be used forfuel. The several hundred participants at the event also heard about advances in battery technology from Eva Hakansson, who together with herhusband, Bill Dube, built the world's fastest electric motorcycle. They are now working on a two-wheeled electric-powered vehicle they hope willgo 400 mph. Improving the energy density of batteries -- how much power they can deliver per unit of weight -- is at the core of advancingelectric flight, according to EAA.

Participants at the symposium discussed both progress and problems encountered over the last year. "There is a ground-swell of activity inthe area of electric flight," said EAA's Ron Wagner. "We live in exciting times." Topics on the agenda included nanotechnology, which isseen as a promising source of advances in batteries, and hybrid power, perhaps combining an internal combustion engine for takeoff and climband switching to electric power for cruise flight. EAA will highlight electronic aircraft advances at AirVenture Oshkosh later this summer,with daily showcase flights, displays, and forums in AirVenture's Aviation Learning Center.

Gorgeous airplane in flight, how much does something like that trike go for? Is it a special wing, or is a hang gliding wing retrofitted? Good finds, I will def have to try this one day. Does this fall under the sport pilot license?

Four wheels moves the body, Two wheels moves the soulThanks to Justin @ http://www.ebike.ca He brings the soul to ES

Looks like about $10,500 for the basic trike w/eprop plus ship to ??? Looks like you could spend a lot more w/the options like folding prop and emerg parachute... Still a lot cheaper than my last sailboat but not as roomy for guests and picnic

Lock

If you like this message feel free to donate BeerCoins (BTC) to: 1LxAXWmbjY6SeMf8r9HHhSKt6pWyPvWg6L